Hi! I have not myself seen Latin for Children but have been told it is similar to Spanish for Children, which I have used and like. You are right–the Getting Started with Latin is less content than other programs. It IS solid for what it does cover, however. With a such an age span, you will have to make a choice between the two. You can either give your daughter a little less content than she is capable of handling, OR you can give your son a little more content than he might be ready for. If you can only get one, you will need to decide. I do think a 9yo could handle LwC OK. If you have to spend a little more memory time or move a little more slowly then it would be OK. How many more years of school are you planning with your older child? You’ll have to consider where you want her to be when you are done–do you envision her having high school credits in Latin? How many? That might affect your choice.
I am a big fan of Latin in the Christian Trivium myself, HOWEVER it is much more expensive than the two programs you’ve mentioned, AND it will still move pretty quickly for your son.
Bottom line, I think either of these could work for you–you just need to consider which need you want to meet first. Another option is to go with LwC for your daughter, and simply wait some time before beginning it with your son. They won’t be “together” but this might be difficult to achieve through high school years, anyway.
